Test FindBar audible alerts.

chrome/browser/ui/views/find_bar_host.h

Index: chrome/browser/ui/views/find_bar_host.h
diff --git a/chrome/browser/ui/views/find_bar_host.h b/chrome/browser/ui/views/find_bar_host.h
index 57800c50276f58fcd8b8ffec9a900a3f4dda5d17..191eb577f7a004ed86e85cc6c3e4d2616be3e41e 100644
--- a/chrome/browser/ui/views/find_bar_host.h
+++ b/chrome/browser/ui/views/find_bar_host.h
@@ -77,6 +77,7 @@ class FindBarHost : public DropdownBarHost,
   base::string16 GetFindSelectedText() override;
   base::string16 GetMatchCountText() override;
   int GetWidth() override;
+  size_t GetAudibleAlertCount() override;
 
   // Overridden from DropdownBarHost:
   // Returns the rectangle representing where to position the find bar. It uses
@@ -130,6 +131,9 @@ class FindBarHost : public DropdownBarHost,
   // A pointer back to the owning controller.
   FindBarController* find_bar_controller_;
 
+  // The number of audible alerts issued.
+  size_t audible_alerts_;
+
   DISALLOW_COPY_AND_ASSIGN(FindBarHost);
 };